There should be many adults who have drunk (tasted) breast milk, but amazingly, it has now become a business. Regardless of whether this business of hiring wet nurses to sell breast milk is suspected of violating the rules (the Health Planning Commission has issued the Reply on Human Breast Milk as a Commodity), as far as nutritional function is concerned, it is unnecessary for adults to pursue the health care function of human breast milk. Although there are various mysteries about the health value of human milk, in fact, we can know that the so-called conditioning is just a cloud with a little analysis. Compared with milk of the same weight, the protein content of human milk is lower (1.2% vs. 3%). The advantage of human milk protein is that the proportion of whey protein is higher than that of milk (70% to 20%), which is very important for infants, because whey protein not only has higher nutritional value (which can support the rapid growth and development of the fetus), but also is easy to digest (which is more suitable for the immature gastrointestinal tract of infants). But for adults (no longer growing, complete digestive function), the special advantage that human milk contains more whey protein no longer exists. Moreover, if you have to care about whey protein, you may wish to choose infant formula or simply take whey protein powder. The calcium content of human milk is not as high as milk, only 1/3 of milk. The advantage of human milk calcium is that its absorption rate is higher than that of milk, that is, it is easily absorbed. Of course, this is also aimed at the immature gastrointestinal tract of infants, and milk is a single or main food. For adults, the diet is more complicated and the intestinal absorption capacity is stronger. Drinking milk can get enough calcium, and there is no need to pursue expensive human milk. From the above analysis of protein and calcium, it can be seen that the real advantage of human milk lies in its easy digestion and absorption, which is particularly important for infants, but not important for adults, or even not worth the loss. Another advantage of human milk is that it contains more nutrients than milk, such as DHA, lutein and nucleotides. This is especially important for infants with monotonous diet (taking milk as a single or main food), but not so important for adults, because adults can get these nutrients through other foods such as fish and vegetables (otherwise, how can women "make" breast milk? )。 If you must keep up with babies, you'd better choose infant formula, because most infant formulas also contain these nutrients. For adults, human milk has little advantage over milk in many aspects and almost no advantage over formula milk powder. However, human milk has an advantage that formula milk powder cannot replace or simulate, that is, it contains active immune substances, such as secretory immunoglobulin A(sIgA), lactoferrin, lysozyme and so on. Among them, sIgA is the most important, and it is the main antibody of local anti-infection immunity of body mucosa. However, sIgA in human milk can only play a role on the surface of intestinal mucosa after entering the intestine, and improve the immunity of intestinal mucosa. Generally, it cannot enter the blood, so it has no direct effect on the immunity of other parts (such as lungs and urinary tract). However, the gastrointestinal tract is, after all, one of the main channels for bacteria and viruses to invade the human body, so sIgA in human milk is of certain significance to infants (with underdeveloped intestines) and critically ill patients with gastrointestinal tract damage. Clinically, some people try to feed human milk to critically ill patients to increase the immunity of gastrointestinal mucosa and nutrition. However, except for pediatric patients, there are few successful reports and there is no convincing evidence-based medical evidence to support this practice. Moreover, lactose should be considered in practical application, and the lactose content in human milk is higher than that in milk. A considerable number of adults cannot digest lactose, which leads to abdominal distension, diarrhea and abdominal discomfort ("lactose intolerance"). Critical patients with intestinal damage are more prone to lactose intolerance, or the situation is more serious, so it is not recommended to drink milk or nutrient solution containing lactose. At this point, breast milk is taboo rather than recommended. Clinically, this critically ill patient can tide over the difficulties through special enteral or parenteral nutrition support. Another real advantage of human milk is its extremely low allergenicity, that is, it will not cause allergies. This is difficult for babies, and adults who are allergic to milk protein (often allergic to animal milk such as dairy sheep, buffalo milk and formula milk) can also choose. However, milk is not indispensable in the adult diet. Adults who are allergic to protein's milk can increase their intake of meat, eggs, fish and bean products even if they don't drink any milk, and get comprehensive nutrition. As we all know, eating health care products often produces a "psychological suggestion effect", that is, if you believe that a product has a miraculous effect, then you are likely to feel the effect after taking it. Will human milk also have the function of conditioning the body? This can only be answered by breast milk consumers. I personally don't think so. Eating human milk will not make people "retreat" to the era of breastfeeding! (Editor: dq 1964)